. >> until now ralph johnson has never talked on tv of what he witnessed by a supervising corrections officer at the baltimore city jail. >> people from your neighborhood inmates become corrections officers. >> an institution overrun with sex, drugs and corruption. >> what happened? >> it really blossomed out of control in 2014 when they started hiring 18-year-olds. >> maryland's short experiment, hiring officers as young as 1 was intended to address a shortage of qualified applicants willing to take low paying jobs, but critics like johnson, who has written a book about the jail, said that it backfired, that the young cos were inexperienced and not well trained and volatile. >> they would manipulate them and have sex with them. and then, it became a money making operation. >> they were making money april inside of the jail. >> it evolved. >> following a multiyear investigation, that involved wiretaps and surveillance, in 2013, 27 corrections officers were indicted. allegations they helped a prison gang running drugs and launder money. more than a dozen members of the black guerilla g